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12. Troubleshooting

This section mainly describes how to handle hardware errors. Refer to the configuration program's on-

line help for errors related to the software.

Error

Valve cannot be moved by actuator

Actuator does not react

Actuator does not work in automatic

mode, although "AUT" has been

selected in the configuration program

LEDs on the commissioning and ser-

vice field are flashing simultaneously

Fault when approaching an end posi-

tion

Table 7:

Possible reason

Malfunction of actuator or valve (e.g.

stuffing box tightened too much)

Wrong electronic unit or wrong data Compare data lables of actuator and

Faulty electronic unit settings

Faulty communication to DCS

Faulty wiring between the electronic

unit and the actuator

Motor / brake is defective

Digital inputs of electronic unit are

not connected

Digital input 1 (DI 1) has not been

connected.

Actuator operating range has not

been adjusted properly

Actuator is working in the limit range

of the position sensor

Measures to be taken

Disconnect the actuator from the

valve.

If the actuator is working properly

then, the valve is likely to be defec-

tive. Otherwise, the actuator seems

to be the error source.

electronic unit

Check / modify settings using the

configuration software

Check wiring

Check the winding resistances of the

motor and brake. Check the brake

fuse.

Connect

- Connect DI 1

- Check software settings for digital

inputs

Adjust the actuator operating range

(see instruction for electronic unit).

- Move the actuator either manually

or with the LCP buttons to a posi-

tion beyond the end position (dis-

connect from valve if required).

- Move actuator back. If required,

reconnect to to the valve (if appli-

cable)

- Adapt actuator to new operating

range